4. Documented baseline NIHSS score of > 7 and < 17 prior to IV rt-PA administration. Subjects who transfer from other facilities after receiving IV rt-PA must have a documented NIHSS by a certified examiner prior to initiation of rt-PA treatment. Documentation of NIHSS score via telemedicine is acceptable if performed by a certified examiner. Subjects who improve prior to NTS procedure will still be treated, unless their NIHSS improves to 0.